286 ENTOMOLOGICAL NEWS. [Nov. , '05 



outer end of the cocoon where it is extruded as in the ^geridse 

 and Cossidae, the pupal shell bursts and the moth is liberated. 

 As far as I could observe, the imagines always emerged in the 

 afternoon and as early in the season as February. A few larvae 

 did not pupate till May, when they developed into moths a 

 few weeks later. 



lyate in April while examining yellow lupine for borers, I 

 had the good fortune of finding a pupa partly extruded from a 

 trunk. Soon a fine 9 emerged which developed rapidly. The 

 $ ? are, as a rule, larger than the S S and less variable. 

 When it is growing dark the $ S commence their oscillating 

 flight which is sustained only for fifteen or twenty minutes 

 when they alight. This oscillating flight is continued over the 

 same spot, the arcs described are of ten or twelve inches. The 

 ? 9 , much less frequently seen, fly rather heavily and, as in 

 the $ $ , close to the ground ; they lay their eggs when on the 

 wing, throwing them out rapidly. The eggs are very minute, 

 turning black after a time ; a single $ lays a great many. 

 These insects are very easily recognized when on the wing by 

 their peculiar flight and form ; they are of many colors, whitish, 

 slate, red, black and other shades with the silvery fascia 

 usually very prominent in the S S and rarely so in the 9 9 • 



Concerning the habits of the larvae, these inhabit only old 

 plants boring in their thicker portions, sometimes going well 

 into the roots and again ascending into the branches. Usually, 



Fig. 4, cocoon found in lupine. 



however, they are found in the main trunk above or below 

 ground ; a large decumbent stem is a particularly favorable 

 locality for them. In the same lupine stem may be found the 

 larvae of the large noctuid, Gortyna immanis, quite sluggish as 

 compared with sequoiolus . The larva of H. sequoiolus appears 

 to have no insect enemies ; in all the larvae which I have found 



